Preparation and characterization of ceria nanospheres by microwave-hydrothermal method

被引：221

作者：

Dos Santos, M. L. ^{[1
]}

Lima, R. C. ^{[1
]}

Riccardi, C. S. ^{[1
]}

Tranquilin, R. L. ^{[1
]}

Bueno, P. R. ^{[1
]}

Varela, J. A. ^{[1
]}

Longo, E. ^{[1
]}

机构：

[1] Univ Estadual Paulista, LIEC, Inst Chem, BR-14800900 Araraquara, SP, Brazil

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 30期

基金：

巴西圣保罗研究基金会;

关键词：

Ceramics; Nanomaterials; Characterization methods; Ceria; Microwave-hydrothermal method;

D O I：

10.1016/j.matlet.2008.08.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Crystalline ceria (CeO2) nanoparticles have been successfully synthesized by a simple and fast microwave-hydrothermal method at 130 degrees C for 20 min. As-synthesized CeO2 powders were calcinated at 500 degrees C for 1, 2 and 4 h. The products were characterized by thermogravimetric analysis (TG-DTA), X-ray powder diffraction (XRD), field-emission scanning electron microscopy/STEM mode (FEG/STEM), Fourier Transformed-IR and RAMAN spectroscopies. It is shown that synthesized ceria powders have a spherical shape with particle size below 10 nm, a narrow distribution and exhibit weak agglomeration. The FTIR spectrum of the ceria exhibits strong broad band below 700 cm(-1) which is due to the delta (Ce-O-C) mode. Raman spectrum is characterized by the presence of a very strong band to 464.5 cm(-1). The microwave-hydrothermal method enabled cerium compounds to be synthesized at low temperature and shorter time. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：4509 / 4511

页数：3

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